Ever walk around a store shopping for "something" based solely upon on the size of the container that "something" comes in?  I have...

EDIT: That one statement just cost me 6 hours of listening to "This American Life" episodes looking for the one time I heard a segment like that.  I never found it.

I give you, the portal fluid container. 

I have a long history of shopping for things with zero intention of using them for their intended purpose.  I'm blessed with a fairly good memory for the price and location of things for some reason, but 2 hours into a conversation I won't have the faintest idea of the name of the person I'm talking to...

I occasionally catalog the contents of Dollar Tree for future scavenging whenever I'm in the area.  They do have 60W LED bulbs there, but at 800 lumens each that would have put me below my 3000 lumen mark.  I can't say I actually remembered the baby bottles though...

Ooo... I did find Walmart now carries 18650 cells in the seasonal lighting (landscape lighting) department... Four for $18 and only 2000 mAh unprotected ones though.  But hey.. they got em.

Anyway, the remainder of the finds which were on my mental list.  This being Dollar Tree, of course everything is $1.

This flashlight gives me a 20mm plano-convex lenses with a ridiculously short ~20mm focal length, in case my fresnel experiments don't pan out.  It's a really crappy lens of course, but hey... at least I have one. No constant current source here for a buck though, so I think this thing has a decent wattage resistor I can steal too (and a moderately sucky LED).

Speaker and amplifier.